80008691 has 4 divisors (see below), whose sum is σ = 91438512. Its totient is φ = 68578872.

The previous prime is 80008627. The next prime is 80008699. The reversal of 80008691 is 19680008.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80008691 - 2⁶ = 80008627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80008699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5714900 + ... + 5714913.

It is an arithmetic number, because the mean of its divisors is an integer number (22859628).

Almost surely, 2^80008691 is an apocalyptic number.

80008691 is a deficient number, since it is larger than the sum of its proper divisors (11429821).

80008691 is a wasteful number, since it uses less digits than its factorization.

80008691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11429820.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 80008691 is about 8944.7577384745. The cubic root of 80008691 is about 430.9025409346.

Adding to 80008691 its reverse (19680008), we get a palindrome (99688699).

The spelling of 80008691 in words is "eighty million, eight thousand, six hundred ninety-one".